_invoke() — langchain Function Reference

Architecture documentation for the _invoke() function in passthrough.py from the langchain codebase.

Function python LangChainCore Runnables calls 2

Entity Profile

LangChainCore→ Runnables→ _invoke() — langchain Function Reference

Dependency Diagram

graph TD
  62dea3ab_c5ad_9f07_f870_49252fed7180["_invoke()"]
  e893b6ae_1c28_41f1_aa8b_a66d0f779312["RunnableAssign"]
  62dea3ab_c5ad_9f07_f870_49252fed7180 -->|defined in| e893b6ae_1c28_41f1_aa8b_a66d0f779312
  933ccc14_844d_c42a_d3ca_33f04cdfba48["assign()"]
  62dea3ab_c5ad_9f07_f870_49252fed7180 -->|calls| 933ccc14_844d_c42a_d3ca_33f04cdfba48
  2f3554c2_6687_e1b6_f023_84b0e33b81ed["invoke()"]
  62dea3ab_c5ad_9f07_f870_49252fed7180 -->|calls| 2f3554c2_6687_e1b6_f023_84b0e33b81ed
  style 62dea3ab_c5ad_9f07_f870_49252fed7180 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/runnables/passthrough.py lines 480–498

    def _invoke(
        self,
        value: dict[str, Any],
        run_manager: CallbackManagerForChainRun,
        config: RunnableConfig,
        **kwargs: Any,
    ) -> dict[str, Any]:
        if not isinstance(value, dict):
            msg = "The input to RunnablePassthrough.assign() must be a dict."
            raise ValueError(msg)  # noqa: TRY004

        return {
            **value,
            **self.mapper.invoke(
                value,
                patch_config(config, callbacks=run_manager.get_child()),
                **kwargs,
            ),
        }